CN114050240B - Titanium-doped porous ternary material, preparation method thereof, half battery and lithium ion battery - Google Patents
Titanium-doped porous ternary material, preparation method thereof, half battery and lithium ion battery Download PDFInfo
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- CN114050240B CN114050240B CN202111304915.8A CN202111304915A CN114050240B CN 114050240 B CN114050240 B CN 114050240B CN 202111304915 A CN202111304915 A CN 202111304915A CN 114050240 B CN114050240 B CN 114050240B
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- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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Abstract
The invention provides a titanium-doped porous ternary material and a preparation method thereof, a half battery and a lithium ion battery, wherein the preparation method comprises the following steps: after heating an organic solvent with lower polarity or a mixed solvent formed by the organic solvent and water in a water bath, adding nickel salt, cobalt salt and manganese salt into the organic solvent according to a certain molar ratio, continuously stirring to uniformly disperse the organic solvent, then adding excessive alkali liquor into a uniformly dispersed system, and carrying out hydrothermal treatment on the obtained system to obtain a mixed solution containing a nanoscale nickel-cobalt-manganese ternary precursor; washing the mixed solution containing the nanoscale nickel-cobalt-manganese ternary precursor with water, adding a surfactant into the mixed solution to enable the system to form an emulsion state, adding a titanate coupling agent and an acid catalyst into the mixed solution, heating and stirring for reaction, and obtaining a titanate-modified nickel-cobalt-manganese porous ternary precursor after the reaction is finished; and mixing the titanate modified nickel-cobalt-manganese porous ternary precursor with a lithium source and then sintering to obtain the titanium doped porous ternary material.
Description
Technical Field
The invention relates to a titanium-doped porous ternary material, a preparation method thereof, a half battery and a lithium ion battery, and belongs to the technical field of lithium ion batteries.
Background
The anode material is an important component of the lithium ion battery, and the ternary material with the layered structure is considered to be one of the most promising anode materials of the lithium ion battery due to the advantages of low price, high capacity, good cycle performance, high safety performance and the like. However, the ternary material has some defects, which severely restrict the application development, and many scholars at home and abroad research and try to improve the performance of the ternary material through surface coating and doping. However, a method for directly preparing the titanium-doped porous ternary material is rarely reported.
Therefore, providing a novel titanium-doped porous ternary material, and a preparation method and application thereof have become technical problems to be solved in the field.
Disclosure of Invention
In order to solve the above disadvantages and shortcomings, an object of the present invention is to provide a method for preparing a titanium-doped porous ternary material.
The invention also aims to provide the titanium-doped porous ternary material prepared by the preparation method of the titanium-doped porous ternary material.
It is also an object of the present invention to provide a half cell.
It is a further object of the present invention to provide a method of making the half cell described above.
The last object of the present invention is also to provide a lithium ion battery.
In order to achieve the above object, in one aspect, the present invention provides a method for preparing a titanium-doped porous ternary material, including:
(1) After heating an organic solvent with lower polarity or a mixed solvent formed by the organic solvent and water in a water bath, adding nickel salt, cobalt salt and manganese salt into the organic solvent according to a certain molar ratio, continuously stirring to uniformly disperse the organic solvent, then adding excessive alkali liquor into a uniformly dispersed system, and carrying out hydrothermal treatment on the obtained system to obtain a mixed solution containing a nanoscale nickel-cobalt-manganese ternary precursor;
(2) Washing the mixed solution containing the nano-scale nickel-cobalt-manganese ternary precursor with water to remove redundant alkali liquor, adding a surfactant into the mixed solution to enable the system to form an emulsion state, adding a titanate coupling agent and an acid catalyst into the mixed solution, heating and stirring for reaction, and obtaining a titanate-modified nickel-cobalt-manganese porous ternary precursor after the reaction is finished;
(3) And mixing the titanate modified nickel-cobalt-manganese porous ternary precursor with a lithium source and then sintering to obtain the titanium doped porous ternary material.
In a specific embodiment of the above preparation method of the present invention, in step (1), the less polar organic solvent includes ethanol.
As a specific embodiment of the above preparation method of the present invention, in the mixed solvent, the mass ratio of the organic solvent with lower polarity to water is 1.
As a specific embodiment of the production method of the present invention described above, wherein, in step (1), the mole fractions of nickel salt, cobalt salt and manganese salt are x, y and (1-x-y), respectively, based on the total mole number of nickel salt, cobalt salt and manganese salt being 100%, wherein 0 & lt y & gt x & lt 1 & gt, 0 & lt x & gt y & lt 1 & gt, 0.3 & lt x & gt 0.95 and 0 & lt y & gt 0.5 are provided.
As a specific embodiment of the above preparation method of the present invention, the mass ratio between the total weight of the nickel salt, cobalt salt and manganese salt and the organic solvent with lower polarity or the mixed solvent of the organic solvent and water is 1.25-4.
As a specific embodiment of the above preparation method of the present invention, wherein the nickel salt is a common soluble nickel salt, including one or more of nickel nitrate, nickel sulfate, and nickel acetate.
As a specific embodiment of the above preparation method of the present invention, the cobalt salt is a common soluble cobalt salt, and includes one or more of cobalt nitrate, cobalt sulfate, and cobalt acetate.
As a specific embodiment of the above preparation method of the present invention, the manganese salt is a common soluble manganese salt, and includes one or more of manganese nitrate, manganese sulfate, and manganese acetate.
In a specific embodiment of the above preparation method of the present invention, in the step (1), the temperature of the water bath heating is 50 to 100 ℃.
As a specific embodiment of the above preparation method of the present invention, in step (1), the alkali solution includes LiOH solution, naOH solution or KOH solution. The lye used in the present invention is used to provide an alkaline environment.
As a specific embodiment of the above preparation method of the present invention, in step (1), the alkali solution includes LiOH solution, naOH solution or KOH solution.
As a specific embodiment of the above preparation method of the present invention, wherein, in the step (1), the concentration of the alkali liquor is 2-6mol/L.
As a specific embodiment of the above preparation method of the present invention, in the step (1), the alkali solution is added in a molar amount of lithium element, sodium element or potassium element, wherein a ratio of the molar amount of lithium element, sodium element or potassium element to the total molar amount of nickel element, manganese element and cobalt element is 2-10.
As a specific embodiment of the above preparation method of the present invention, in the step (1), the temperature of the hydrothermal treatment is 180 to 220 ℃.
As a specific embodiment of the above preparation method of the present invention, in the step (2), the water washing is performed by using deionized water.
As a specific embodiment of the above preparation method of the present invention, in the step (2), the mass ratio of the surfactant, the acid catalyst, the titanate coupling agent, and the nanoscale nickel-cobalt-manganese ternary precursor is 0.01-0.5-0.05-1.
As a specific embodiment of the above preparation method of the present invention, wherein the surfactant comprises at least one of tween-20, tween-40, tween-60, tween-80, tween-65, tween-85, span-20, span-40, span-60, span-80, span-65, and span-85.
As a specific embodiment of the above preparation method of the present invention, the titanate coupling agent includes at least one of isopropyl (dioctyl pyrophosphato acyloxy) titanate, bis (dioctyl pyrophosphate) ethylene titanate, and isopropyl dioleate acyloxy (dioctyl phosphato) titanate. Wherein the titanate coupling agent acts as a hydrophobic modifier.
In a specific embodiment of the above preparation method of the present invention, the acid catalyst comprises one or more of hydrochloric acid, sulfuric acid, nitric acid, and acetic acid.
As a specific embodiment of the above preparation method of the present invention, the mass concentration of the mixed solution containing the nanoscale nickel-cobalt-manganese ternary precursor after water washing is controlled to be 25 to 37wt%.
As a specific embodiment of the above preparation method of the present invention, in the step (2), the system is formed into an emulsion state by high speed stirring, wherein the rotation speed of the high speed stirring is 400-1200rpm.
As a specific embodiment of the above preparation method of the present invention, wherein the reaction in step (2) is at 20-110 ℃ for 0.5-5h.
As a specific embodiment of the above preparation method of the present invention, in the step (2), the particle size of the titanate modified nickel-cobalt-manganese porous ternary precursor is 4 to 8 μm.
As a specific embodiment of the above preparation method of the present invention, in the step (2), after the reaction is finished, the obtained product needs to be sequentially washed, stood, filtered (such as pressure filtration), dried, and the like; wherein the washing is washing by using deionized water to wash out residual ions, surfactants, titanate coupling agents, inorganic acid catalysts and the like in the product; the drying is normal pressure drying, and is drying for 1-12h at 80-130 ℃ under normal pressure.
As a specific embodiment of the above preparation method of the present invention, in the step (3), the amount of the lithium source is calculated by the molar amount of lithium element, wherein the ratio of the molar amount of lithium element to the total molar amount of nickel element, manganese element and cobalt element is 1.03-1.1, preferably 1.05.
In a specific embodiment of the above preparation method of the present invention, the lithium source includes lithium carbonate and/or lithium hydroxide.
As a specific embodiment of the above preparation method of the present invention, the titanate-modified nickel-cobalt-manganese porous ternary precursor and a lithium source are uniformly mixed by a 3D mixer and then sintered.
As a specific implementation mode of the preparation method, the sintering is to heat up to 500 ℃ at a heating rate of 2 ℃/min in the air or oxygen atmosphere, keep the temperature for 1-10h, heat up to 650-900 ℃ at a heating rate of 2 ℃/min, keep the temperature for 10-15h, and then naturally cool.
In the process of preparing the titanium-doped porous ternary material, firstly preparing a mixed solution containing a nano-scale nickel-cobalt-manganese ternary precursor, then adding a surfactant into the mixed solution for activation, adding a titanate coupling agent as a hydrophobic modifier and an inorganic acid as a catalyst, heating and stirring at a high speed for chemical reaction, hydrolyzing the titanate coupling agent, dehydrating and condensing with hydroxyl on the surface of the precursor, so that organic molecular chains with titanate functional groups are uniformly coated on the surface and pores of the precursor, and simultaneously preparing the titanium-doped porous ternary precursor, namely the titanate-modified nickel-cobalt-manganese porous ternary precursor under the action of titanate coupling agent groups with a hydrophobic effect; and finally, after mixing and sintering the titanate modified nickel-cobalt-manganese porous ternary precursor and a lithium source, decomposing organic functional groups of titanate to generate titanium dioxide, and uniformly doping the titanium dioxide into the porous ternary material.
In the step (2) of the preparation method of the titanium-doped porous ternary material, a liquid crystal phase of a surfactant is generated before the surfactant is added into the mixed solution, and the surfactant with hydrophilic and hydrophobic groups first forms spherical micelles and then rod-shaped micelles in water; when the concentration of the surfactant is higher, a liquid crystal structure in hexagonal ordered arrangement can be formed, the nanoscale nickel-cobalt-manganese ternary precursor is precipitated in the middle of the rodlike micelle, and pore walls are solidified to form a porous structure.
On the other hand, the invention also provides the titanium-doped porous ternary material prepared by the preparation method of the titanium-doped porous ternary material.
In still another aspect, the invention also provides a half cell made of the titanium-doped porous ternary material.
In another aspect, the present invention further provides a method for manufacturing the half cell, including:
mixing the titanium-doped porous ternary material, a conductive agent and a binder to obtain a mixture; and then sequentially coating and vacuum-drying the slurry obtained by ball-milling the mixture to obtain the half-cell.
Finally, the invention also provides a lithium ion battery, and the used anode material is prepared from the titanium-doped porous ternary material.
In the titanium-doped porous ternary material provided by the invention, the titanium element is doped, so that lithium and nickel can be prevented from being mixed and discharged, the phase change in the circulation process can be effectively relieved, the effect of stabilizing the structure can be achieved, and the circulation performance of a lithium ion battery can be improved; in addition, the material also contains a porous structure, the porous structure can obviously improve the contact area of the anode material of the lithium ion battery and the electrolyte/electrolyte, the contact is more sufficient, and meanwhile, the diffusion path of lithium ions can be shortened, so that the electrochemical properties of the lithium ion battery, such as rate capability, cycle performance and the like, are improved.
The preparation method of the titanium-doped porous ternary material provided by the invention is simple and rapid, and the titanium-doped porous ternary material can be quickly prepared.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a cross-sectional view of a titanate-modified nickel-cobalt-manganese porous ternary precursor prepared in example 1 of the present invention.
Fig. 2 is a 50-week cycle curve for cell 1 and cell 2 at 1C in test example 1 of the present invention.
Detailed Description
The "ranges" disclosed herein are given as lower and upper limits. There may be one or more lower limits, and one or more upper limits, respectively. The given range is defined by the selection of a lower limit and an upper limit. The selected lower and upper limits define the boundaries of the particular range. All ranges defined in this manner are combinable, i.e., any lower limit can be combined with any upper limit to form a range. For example, ranges of 60-120 and 80-110 are listed for particular parameters, with the understanding that ranges of 60-110 and 80-120 are also contemplated. Further, if the minimum range values listed are 1 and 2 and the maximum range values listed are 3,4, and 5, then the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5.
In the present invention, unless otherwise stated, the numerical range "a-b" represents a shorthand representation of any combination of real numbers between a and b, where a and b are both real numbers. For example, a numerical range of "0 to 5" indicates that all real numbers between "0 to 5" have been listed throughout this disclosure, and "0 to 5" is only a shorthand representation of the combination of these numbers.
In the present invention, all embodiments and preferred embodiments mentioned in the present invention can be combined with each other to form a new technical solution, unless otherwise specified.
In the present invention, all the technical features mentioned in the present invention and preferred features can be combined with each other to form a new technical solution, if not specifically stated
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the attached tables and embodiments. The following described embodiments are illustrative of some, but not all, of the present invention and should not be construed as limiting the scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention. The examples, in which specific conditions are not specified, were carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The embodiment provides a titanium-doped nickel-cobalt-manganese porous ternary material, which is prepared by the following steps:
s1: carrying out water bath heating on a mixed solution formed by 1200g of water and 1800g of absolute ethyl alcohol, wherein the temperature of the water bath heating is 60 ℃, dispersing 8mol of nickel acetate, 1mol of cobalt acetate and 1mol of manganese acetate in the mixed solution, continuously stirring to uniformly disperse the mixed solution, then adding 6L of LiOH solution with the concentration of 4mol/L into the uniformly dispersed system, placing the obtained reaction solution in a reaction kettle, and carrying out heat preservation at 200 ℃ for 12 hours to carry out hydrothermal treatment to obtain a mixed solution containing a nano nickel cobalt manganese ternary precursor;
s2: washing the mixed solution by using deionized water to wash away residual LiOH, controlling the concentration of the mixed solution after washing to be 25wt% to obtain 3696g of mixed solution, wherein the mass of the nanoscale nickel-cobalt-manganese ternary precursor is 924g, adding 12.4g span-20 into the mixed solution, stirring at a high speed of 1000rpm to enable the system to form an emulsion state, adding 82.11g isopropyl (dioctyl pyrophosphoric acyloxy) titanate and 62g acetic acid, heating to 80 ℃, adjusting the stirring speed to be 800rpm, continuously reacting for 3h, washing the product by using deionized water after the reaction is finished, performing filter pressing, and drying at a normal pressure of 110 ℃ for 8h to obtain the nickel-cobalt-manganese porous ternary precursor with the granularity of 4-8 mu m, wherein the cross-sectional view of the nickel-cobalt-manganese porous ternary precursor modified by titanate is shown in figure 1, and the coupling agent can be uniformly distributed in the porous ternary precursor, so that the titanium element is more uniformly distributed in the finished product of the titanium-doped nickel-manganese porous ternary material, and the titanium-cobalt element can play a better role, such as better relieving discharge of lithium titanate, effectively and improving the phase change of the lithium ion battery, and effectively, and improving the stability of the lithium ion battery.
S3: weighing lithium hydroxide according to the molar weight of the lithium element and the total molar weight of the nickel element, the manganese element and the cobalt element being 1.04, and uniformly mixing the lithium hydroxide with the titanate-modified porous ternary precursor obtained in S2 through a 3D mixer to obtain a product to be burnt;
s4: and placing the obtained product to be sintered in a Zhongpeng furnace, heating to 500 ℃ at the heating rate of 2 ℃/min in the oxygen atmosphere, preserving the heat for 5h, heating to 780 ℃ at the heating rate of 2 ℃/min, keeping the temperature for 15h, and naturally cooling in the oxygen atmosphere to obtain the titanium-doped nickel-cobalt-manganese porous ternary material.
Application example 1
This example provides a half cell prepared by the following method:
firstly, mixing the titanium-doped nickel-cobalt-manganese porous ternary material prepared in the embodiment 1, a conductive agent carbon black and a binder PVDF according to a weight ratio of 98;
then coating the obtained slurry on an aluminum foil current collector;
drying at 80 ℃ for 12h, rolling, and vacuum drying at 80 ℃ for 12h to obtain the lithium ion battery positive pole piece, wherein the compaction density of the pole piece is controlled to be 3.2g/cm 3 。
Comparative application example 1
This comparative example provides a half-cell prepared by the following method:
LiNi which is a conventional positive electrode active material in the art is first prepared 0.8 Co 0.1 Mn 0.1 O 2 Mixing the conductive agent carbon black and the binder PVDF according to a mass ratio of 98;
then coating the obtained slurry on an aluminum foil current collector;
drying at 80 deg.C for 12h, rolling, and vacuum drying at 80 deg.C for 12h to obtain lithium ionThe compaction density of the positive pole piece of the battery is controlled to be 3.2g/cm 3 。
Test example 1
Respectively taking the positive pole piece in the application example 1 and the positive pole piece in the application comparative example 1 as a positive pole, taking graphite as a negative pole, and taking the LiPF with the concentration of 1mol/L 6 (solute)/EC + DEC + EMC (solvent) is used as electrolyte, the N/P ratio in the electrolyte is controlled to be 1.15, jinli-20 produced by Hebei Jinli New energy science and technology GmbH is used as a diaphragm to assemble the lithium ion battery, which is respectively marked as a battery 1 and a battery 2, and the electrochemical performance of the lithium ion battery is tested by adopting the conventional method in the field.
The first charge-discharge capacity, first coulombic efficiency, rate and cycle data of the batteries 1 and 2 are shown in the following table 1; in addition, the cycle curves of cell 1 and cell 2 at 1C for 50 weeks are shown in fig. 2.
TABLE 1
As can be seen from table 1 and fig. 2, the electrochemical performance of the battery 1 prepared by the application example 1 of the present invention is significantly better than that of the battery 2 prepared by the application comparative example 1, so that the electrochemical performance of the battery prepared by using the titanium-doped nickel-cobalt-manganese porous ternary material provided by the present invention as the cathode material is more excellent compared with the conventional nickel-cobalt-manganese porous ternary material in the art.
It should be understood that the above description is only exemplary of the invention, and is not intended to limit the scope of the invention, so that the replacement of equivalent elements or equivalent changes and modifications made in the present invention should be included within the scope of the present invention. In addition, the technical features and the technical inventions of the present invention, the technical features and the technical inventions, and the technical inventions can be freely combined and used.
Claims (11)
1. A preparation method of a titanium-doped porous ternary material is characterized by comprising the following steps:
(1) After ethanol or a mixed solvent formed by ethanol and water is heated in a water bath, adding nickel salt, cobalt salt and manganese salt according to a certain molar ratio, continuously stirring to uniformly disperse the nickel salt, the cobalt salt and the manganese salt, then adding excessive alkali liquor into a uniformly dispersed system, and carrying out hydrothermal treatment on the obtained system to obtain a mixed solution containing a nanoscale nickel-cobalt-manganese ternary precursor;
(2) Washing the mixed solution containing the nano-scale nickel-cobalt-manganese ternary precursor with water to remove redundant alkali liquor, adding a surfactant into the mixed solution to enable the system to form an emulsion state, adding a titanate coupling agent and an acid catalyst into the mixed solution, heating and stirring for reaction, and obtaining a titanate-modified nickel-cobalt-manganese porous ternary precursor after the reaction is finished;
(3) And mixing the titanate modified nickel-cobalt-manganese porous ternary precursor with a lithium source and then sintering to obtain the titanium doped porous ternary material.
2. The method according to claim 1, wherein in the mixed solvent, the mass ratio of ethanol to water is 1;
the mole fractions of the nickel salt, the cobalt salt and the manganese salt are x, y and (1-x-y) respectively based on the total mole number of the nickel salt, the cobalt salt and the manganese salt being 100 percent, wherein 0-type y-type yarn-woven fabric-cover x-type yarn-woven fabric 1, 0-type yarn-woven fabric-cover x-type yarn-woven fabric 1, 0.3-type yarn-woven fabric-cover x-type yarn-woven fabric 0.95 and 0-type yarn-woven fabric 0.5;
the mass ratio of the total weight of the nickel salt, the cobalt salt and the manganese salt to the ethanol or the mixed solvent formed by the ethanol and the water is 1.25-4;
the nickel salt comprises one or more of nickel nitrate, nickel sulfate and nickel acetate;
the cobalt salt comprises one or more of cobalt nitrate, cobalt sulfate and cobalt acetate;
the manganese salt comprises one or more of manganese nitrate, manganese sulfate and manganese acetate.
3. The method according to claim 1 or 2, wherein in step (1), the temperature of the water bath heating is 50-100 ℃;
the alkali liquor comprises LiOH solution, naOH solution or KOH solution;
the concentration of the alkali liquor is 2-6mol/L;
the addition amount of the alkali liquor is calculated by the molar amount of lithium element, sodium element or potassium element, wherein the ratio of the molar amount of the lithium element, the sodium element or the potassium element to the total molar amount of nickel element, manganese element and cobalt element is 2-10;
the temperature of the hydrothermal treatment is 180-220 ℃.
4. The method according to claim 1, wherein in the step (2), the mass ratio of the surfactant, the acid catalyst, the titanate coupling agent and the nanoscale nickel-cobalt-manganese ternary precursor is 0.01-0.5;
the surfactant comprises at least one of tween-20, tween-40, tween-60, tween-80, tween-65, tween-85, span-20, span-40, span-60, span-80, span-65 and span-85;
the titanate coupling agent comprises at least one of isopropyl (dioctyl pyrophosphato acyloxy) titanate, bis (dioctyl pyrophosphato) ethylene titanate and isopropyl dioleate acyloxy (dioctyl phosphato) titanate;
the acid catalyst comprises one or more of hydrochloric acid, sulfuric acid, nitric acid and acetic acid;
and controlling the mass concentration of the mixed solution containing the nanoscale nickel-cobalt-manganese ternary precursor after water washing to be 25-37wt%.
5. The method according to claim 1 or 4, wherein in the step (2), the system is formed into an emulsion state by high-speed stirring, wherein the rotation speed of the high-speed stirring is 400-1200rpm;
the reaction in the step (2) is carried out at the temperature of 20-110 ℃ for 0.5-5h;
in the step (2), the granularity of the titanate modified nickel-cobalt-manganese porous ternary precursor is 4-8 μm.
6. The method according to claim 1, wherein in the step (3), the lithium source is used in an amount based on a molar amount of lithium element, wherein a ratio of the molar amount of lithium element to a total molar amount of nickel element, manganese element and cobalt element is 1.03-1.1;
the lithium source comprises lithium carbonate and/or lithium hydroxide;
uniformly mixing the titanate modified nickel-cobalt-manganese porous ternary precursor with a lithium source through a 3D mixer, and sintering;
the sintering is carried out by heating to 500 ℃ at the heating rate of 2 ℃/min in the air or oxygen atmosphere, keeping the temperature for 1-10h, heating to 650-900 ℃ at the heating rate of 2 ℃/min, keeping the temperature for 10-15h, and then naturally cooling.
7. The method of claim 6, wherein in step (3), the lithium source is used in a molar amount of lithium, wherein the ratio of the molar amount of lithium to the total molar amount of nickel, manganese and cobalt is 1.05.
8. The titanium-doped porous ternary material prepared by the preparation method of the titanium-doped porous ternary material as described in any one of claims 1 to 7.
9. A half-cell made from the titanium-doped porous ternary material of claim 8.
10. A method of fabricating a half-cell according to claim 9, comprising:
mixing the titanium-doped porous ternary material of claim 8, a conductive agent and a binder to obtain a mixture; and then sequentially coating and vacuum drying the slurry obtained by ball milling the mixture to obtain the half cell.
11. A lithium ion battery, wherein the cathode material is made of the titanium-doped porous ternary material of claim 8.
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| CN202111304915.8A CN114050240B (en) | 2021-11-05 | 2021-11-05 | Titanium-doped porous ternary material, preparation method thereof, half battery and lithium ion battery |
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